Ergotron LX Monitor Arm is Derek's recommendation for most people reading this comparison. Score: 9.6/10. Highest ROI desk purchase. 4 years, zero required adjustments.
Logitech MX Master 3S (9.2/10) is the right choice for a specific situation: knowledge workers using mouse 6+ hours daily. If that describes you, the full review has the complete math.
Frequently Asked Questions
Which is better: Ergotron LX Monitor Arm or Logitech MX Master 3S?
Ergotron LX Monitor Arm (9.6/10) wins for most people. Highest ROI desk purchase. 4 years, zero required adjustments. Logitech MX Master 3S is the right choice if: knowledge workers using mouse 6+ hours daily.
What is Derek's score for Ergotron LX Monitor Arm?
Derek rates Ergotron LX Monitor Arm 9.6/10. Verdict: Highest ROI desk purchase. 4 years, zero required adjustments.
What is Derek's score for Logitech MX Master 3S?
Derek rates Logitech MX Master 3S 9.2/10. Verdict: Silent click changed the category. 4-year evaluation across 3 generations.
Who should choose Ergotron LX Monitor Arm?
Single monitor setup — 4 years of daily use.
Who should choose Logitech MX Master 3S?
Knowledge workers using mouse 6+ hours daily.
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Head to head, by the numbers
Ergotron LX Single Monitor Arm
Logitech MX Master 3S
Derek's score
9.6/10
9.2/10
Price
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Top strength
Zero drift in 4 years of daily use
Silent click removes noise from shared environments
Biggest drawback
Higher upfront cost than budget alternatives
Right-handed only — no left-handed version
The case for Ergotron LX Single Monitor Arm
Zero drift in 4 years of daily use
Adjustable spring tension accommodates different monitor weights
Real cable management channels (not decorative)
Full tilt, swivel, and height adjustment range
The case for Logitech MX Master 3S
Silent click removes noise from shared environments
MagSpeed scroll wheel works correctly after 4 years
70-day battery life per charge
3-device Bluetooth switching
Bottom line
Ergotron LX Single Monitor Arm takes this one on the numbers (9.6/10 vs 9.2/10). Four years of daily use. Zero required adjustments since initial positioning. The highest-return setup purchase available.
That said, Logitech MX Master 3S isn't a loser — it's a different answer. Derek's daily driver for four years across three mouse generations. The 3S refinements are the ones that mattered.